The business end of this tool fits Sram GXP, Shimano, Sugino, Phil Wood, Chris King, Miche, Tange, Andel (and many more) 16-notch external bearing bottom bracket cups with a 44mm diameter.

It also works perfectly to install and remove Phil Wood Pro Track, Alter Pista, Sugino Fumikiri and other 16-notch lockrings.

The small end...well...it's useless when it comes to track bikes. Do what we did in our workshop—remove the little plastic Hollowtech II adjustment wheely-deal, throw it in the trash and wrap the handle with some leftover bar tape for more grip.